Pleeease help me! chemistry question. needs an answer!!!!!!!!!!!!!!?

The heat of combustion for propane (C3H8) is 2.044 KJ/mol. How many grams of propane must be burned to increase the tempature of 3.00 liters of ethanol from 25.0 degrees c to 40.0 degrees c? the specific heat of ethanol is 2.35 J/g - degrees c; the density of ethanol is .789 g/ml.